Hydraulic Pressure Test Procedure; Pressure Port Locations; Test One - Jeep J-10 Series 1982 Technical & Service Manual

2C-14 AUTOMATIC TRANSMISSION
APPLY (RED FRONT SERVO
RELEASE (YELLOW) 41775
Fig. 2C-15 Pressure Port Locations
Hydraulic Pressure Test Procedure
Before the test, check and correct fluid level and con
trol linkage adjustments, and connect a tachometer to
the engine. Raise the vehicle on a hoist that will allow
the wheels to rotate freely and connect the test gauge
hoses to the appropriate transmission pressure ports.
Test One
This test checks pump output, pressure regulator
valve operation, front/rear clutch and oil filter condition
by measuring transmission operating pressure at the
accumulator and front servo pressure ports in range.
(1) Turn test gauge selector handle to line pressure
position.
(2) Start and operate engine at idle speed, move
gearshift lever to D range and note line pressure.
(3) At idle, pressure should be 54 to 60 psi (372 to
414 kPa).
(4) Increase engine rpm to 1600 and slowly move
valve body throttle lever fully forward then fully rear
ward. With throttle lever in forward position, pressure
should be 54 to 60 psi (372 to 414 kPa) and gradually
increase to 94 psi (648 kPa) when lever is moved
rearward.
(5) Turn test gauge selector handle to front servo
apply position.
(6) Operate engine at 1000 rpm, allow transmission
to upshift into third gear, and note servo pressure. Pres
sure should not vary from previously noted line pressure
by more than 3 psi (21 kPa).
(7) Slowly move throttle linkage to full throttle po
sition and note servo pressures just prior to and after
transmission downshifts. Servo pressure should in
crease then drop to 0 psi after downshift.
LUBRICATION PRESSURE
(COOLER RETURN FITTING)
GOVERNOR
PRESSURE
REAR SERVO
APPLY PRESSURE
41776
Fig. 2C-16 Pressure Port Locations
Test Two
This test checks pump output, pressure regulation,
and front clutch/rear servo condition by measuring and
comparing operating pressures at the rear servo and
accumulator pressure ports in gear ranges 1 and 2.
(1) Turn test gauge selector handle to line pressure
position.
(2) Move gearshift lever to 1 range, operate engine
at 1000 rpm, and slowly move valve body throttle lever
fully forward then fully rearward. With lever in for
ward position, pressure should be 54 to 60 psi (372 to 414
kPa) and gradually increase to 90 to 96 psi (621 to 662
kPa) as lever is moved rearward.
(3) Turn test gauge selector handle to rear servo
apply position.
(4) Operate engine at 1000 rpm. Slowly move valve
body throttle lever fully forward then fully rearward.
Compare pressure registered at servo with line pressure
recorded at accumulator port. Servo pressure should not
vary from line pressure by more than 3 psi (21 kPa).
(5) Turn test gauge selector handle to line pressure
position.
(6) Place gearshift lever in 2 range and operate en
gine at 1000 rpm.
(7) Slowly move valve body throttle lever fully for
ward then fully rearward and note pressures. With lever
in forward position, pressure should be 54 to 60 psi (372
to 414 kPa) and gradually increase to 90 to 96 psi (621 to
662 kPa) as lever is moved rearward.
Test Three
This test checks pump output, pressure regulation,
and front clutch/rear servo condition by measuring and
comparing operating pressure at the rear servo pressure
port in Reverse.
NOTE: For this test, only the high pressure gauge in
the test set is used. Since the gauge hose is connected
directly to the rear servo, it is not necessary to move the
test gauge selector handle to any specific position.
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